T. regularis, as the species first described, must 

 retain its name; it is characterized by the regu- 

 larity of its elytral sculpture, the granules on the 

 second and fourth interstices being small and 

 hardly larger than those on the other interstices, 

 the number of granules on the second is only a few 

 less than the number on the third interstice. 



T. helm si was separated on account of its nar- 

 rower form, greater convexity, and the less conical 

 granules of the elytra. The differences are, how- 

 ever, slight and inconstant, and I regard T. helmsi 

 as certainly conspecific with T. regularis. 



T. cequalis differs in its flatter form and in the 

 granules on the second and fourth interstices, these 

 are fewer in number, more elongate and more 

 depressed; the relation of the granules on the 

 second to those on the third interstice is about one 

 to two. It would seem advisable, therefore, to 

 retain the name cequalis at least for a variety. 

 The above notes are founded on an examination 

 and comparison of the tf types of the species. 

 On the females it is not so easy to reach a conclu- 

 sion, the sculpture of the elytra varies more and 

 in all the females are more robust and convex; 

 indeed, it is not easy to absolutely associate females 

 with the corresponding males. The type females 

 of T. regularis and T . aiqualis are in my own col- 

 lection, having been retained by Mr. Sloane, so I 

 have taken them for comparison. The types ( 9 ) 

 of T. regularis and of T. helmsi correspond fairly 

 closely with their respective males; the 9 type 

 of T. wqualis, however, while of the elongate 

 depressed form of the S ? has the elytral inter- 

 stices much more evenly granulate, and corresponds 

 more with a number of specimens in the Museum 

 collection from North-west South Australia 

 ( Wells' Expedition). The type of T. solidus is a 

 9 , and in size and general appearance closely 

 resembles the 9 T. regularis; it, however, has 

 the granules larger and fewer in number on the 

 second and fourth interstices. I am inclined to 

 regard the type as a large specimen of T. cequalis. 



In conclusion I may say that the slight differences 

 between T. regularis and T. cequalis are much less 

 than exist in big series of other species, as for instance 

 in T. bucephalus, and I think there is little to be 



